HOUSING AS 1256711 - Caterpillar

Table 1
J1939 Code and Description Comments
7107-5
Aftertreatment #1 DEF Pump : Current Below Normal There is an open circuit in the Diesel Exhaust Fluid (DEF) pump feedback wiring.
7107-6
Aftertreatment #1 DEF Pump : Current Above Normal There is a short circuit in the DEF pump feedback wiring.
7107-11
Aftertreatment #1 DEF Pump : Other Failure Mode A failed DEF Pump has been detected.
Illustration 1 g03741437
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -5 code is active or logged.
Proceed to Test Step 2.
Result: A -6 code is active or logged.
Proceed to Test Step 3.
Result: A -11 code is active or logged.
Proceed to Test Step 5.
2. Check the Wiring to the Diesel Exhaust Fluid (DEF) Pump for an Open Circuit
A. Turn the AC breaker, on the front face of the dosing cabinet, to the OFF position. Turn the DC breaker, located in the power distribution box, to the OFF position.
B. Disconnect the J1 and J2 connector from the Selective Catalyst Reduction (SCR) controller.
C. Disconnect the 3-pin DEF pump harness.
D. Measure the resistance between the following pins:
- Pin 1 and Pin 18 SCR controller J1 connector
- Pin 2 and Pin 44 SCR controller J1 connector
- Pin 3 and Pin 45 SCR controller J1 connector
Open Circuit
Result: There were less than 10 ohms of resistance between all the pins.
Proceed to Test Step 6.
Result: There were more than 10 ohms of resistance between two or all the pins.
Repair: An open circuit has been detected. Repair or replace the wiring harness.
Proceed to Test Step 6.
3. Check the Wiring to the DEF Pump for a Short Circuit to Ground
A. Turn the AC breaker, on the front face of the dosing cabinet, to the OFF position. Turn the DC breaker, located in the power distribution box, to the OFF position.
B. Disconnect the J1 and J2 connector from the SCR controller.
C. Disconnect the 3-pin DEF pump harness.
D. Measure the resistance between the following pins:
- Pin 1 and Engine ground
- Pin 2 and Engine ground
- Pin 3 and Engine ground
Short Circuit
Result: There were more than 10 K ohms of resistance between the pins and a known good ground.
Proceed to Test Step 4.
Result: There were less than 10 K ohms of resistance between the pins and a known good ground.
Repair: A short circuit to ground has been detected. Repair or replace the wiring harness.
Proceed to Test Step 6.
4. Check the Wiring to the DEF Pump for a Short Circuit
A. Turn the AC breaker, on the front face of the dosing cabinet, to the OFF position. Turn the DC breaker, located in the power distribution box, to the OFF position.
B. Disconnect the J1 and J2 connector from the SCR controller.
C. Disconnect the 3-pin DEF pump harness.
D. Measure the resistance between the following pins:
- Pin 1 on the DEF pump harness connector and all other pins on the SCR